Downtown St. Louis skyline with the Gateway Arch along the Mississippi riverfront

40+ Years in St. Louis · Residential & Commercial · Family Operated

St. Louis HVAC,Built to Last.

Union-trained Local 36 craftsmanship, Daikin Comfort Pro equipment, and honest second opinions for St. Louis homeowners and businesses since 1984.

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  • Family-Owned Since 1984
  • Local 36 Union
  • NATE Certified
  • Daikin Comfort Pro Authorized Dealer

South St. Louis HVAC, Built to Last.

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COMPREHENSIVE HVAC

Comprehensive HVAC Services

Expert care for every season

Whether you need a new Daikin air conditioner, a high-efficiency Daikin furnace, or advanced indoor air quality, our certified technicians deliver residential, commercial, and new-construction solutions.

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Air Conditioning

Central cooling, heat pumps, and ductless mini-splits — Daikin systems sized, installed, and serviced for St. Louis summers.

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Heating

Furnaces, heat pumps, and boilers — proper sizing, union-quality connections, and service you can count on when cold weather hits.

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Indoor Air Quality

Filtration, humidity control, and ventilation strategies for healthier air throughout your home.

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Ductless

Ductless mini-split installs for additions, upstairs rooms, and zoning — Local 36 craftsmanship for quiet, efficient comfort where ducts can't reach.

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THE DEGENHARDT DIFFERENCE

Beyond the Quick Fix

We diagnose the whole comfort system, explain the options in plain English, and install with union-trained craft so the solution lasts beyond the service call.

Custom sheet metal ductwork fabricated and installed by the Degenhardt crew on a commercial building
Whole-system diagnostics
Clear written options
Daikin FIT guidance
Maintenance follow-through
01

Free Estimates

Upfront scope and pricing — no surprises before we roll a truck.

Clear options before work starts
02

Holistic System Evaluation

We assess airflow, ductwork, loads, and controls — not just the noisy part.

System-first diagnosis
03

Precision Services

Union sheet metal craftsmanship and factory-correct practices on every job.

Local 36 workmanship
04

Long-Term Follow-Up

Tune-ups, reminders, and honest advice so your system stays efficient for years.

Care after install day

Need an honest answer?

Get a second opinion before you replace the whole system.

Bring us the quote or symptoms. We will tell you what is urgent, what can wait, and where a Daikin upgrade actually makes sense.

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Union-Built Comfort

The same family name on the truck since 1984

Degenhardt Heating and Cooling has been a fixture in South St. Louis since 1984. Today it's owned and run by Adam & Ryan Cella and TJ & Courtney Degenhardt — the second generation of the family on the trucks. When you call, you reach the people whose name is on the door, not a call center for a private-equity rollup that bought the brand.

Our crews are trained through Local 36 of the Sheet Metal Workers' union — the gold standard for fabrication and HVAC craftsmanship. That means precision-built ductwork, factory-correct Daikin installations, and work that's south st. louis hvac, built to last..

Family-Owned

Two generations on the trucks

Local 36

Union sheet-metal craftsmanship

NATE

Factory-trained, certified techs

Since 1984

Serving South St. Louis

Read Our StoryWhy Degenhardt
Custom Local 36 union sheet-metal spiral ductwork fabricated by Degenhardt Heating and Cooling

40+

Years strong

Plan With Confidence

Not sure what you need? Start here.

Three free, no-pressure tools to help you weigh your options before you commit. No instant online prices and no auto-booking — just an honest read and a real follow-up from our team.

Free guided estimate

Repair or Replace?

Answer a few quick questions about your system and goals for an honest recommendation — no online price guesses.

Get a clear next step + free in-home assessment

Start the estimator
Free comfort checkup

Home Comfort Checkup

Tap what you've noticed — uneven temps, rising bills, strange noises, humidity — and we'll suggest a tailored next step.

A real person follows up to find a time

Run the checkup
Rebates & incentives

Rebate Explorer

Explore Ameren Missouri, Spire, and Daikin rebate maximums you may qualify for on a St. Louis HVAC upgrade.

We confirm eligibility & handle the paperwork

Explore rebates

Prefer to just talk it through? Call (314) 631-1554

How We Can Help

Targeted Comfort
Solutions

Whether it's your family home or your business, we have the expertise to keep your environment perfectly controlled year-round.

Residential

Home Comfort

Experts

Comprehensive residential services ensuring your home's heating, cooling, and air quality needs are met with professionalism and efficiency.

Single-family homes
Energy-efficient upgrades
Smart thermostat integration
Indoor air quality solutions
Maintenance plans
Fast, flexible scheduling

Family-Owned

Since 1984

Residential HVAC Services
Commercial

Business

Solutions

Robust, scalable solutions for businesses of all sizes — from light commercial to full commercial operations in your area.

Light commercial spaces
Full commercial buildings
Multi-family properties
Preventive maintenance agreements
Complete system installations
Custom sheet-metal fabrication

Local 36

Union sheet-metal

Commercial HVAC Services

Focused Expertise, Exceptional Results

We specialize in residential and light commercial properties for concentrated, expert service.

Free Estimate(314) 631-1554
YEARLY MAINTENANCE PLAN

Protect Your
Investment

Pay once a year for complete peace of mind. Regular maintenance is the best value for ensuring your AC and heating systems are always tuned and ready.

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BEST VALUE

YEARLY PLAN

SAVE BIG

Call for current pricing

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TWO CHECKUPS

Per Year

Spring and fall tune-ups to keep your system running at peak performance.

PRIORITY

Service

Jump to the front of the line during busy seasons when you need us most.

Why Maintenance Matters

Extends equipment lifespan
Lowers energy bills
Prevents costly breakdowns
Maintains warranty coverage
Improves air quality
Peace of mind

Sign up for your maintenance plan

Limited time: Free diagnostic included with sign-up

Serving Saint Louis, MO & surrounding areas

SIGN UP TODAY(314) 631-1554
Licensed & Insured
Fast, Flexible Scheduling
Special Offers

Current Deals

Manufacturer rebates and seasonal maintenance offers, presented clearly so you can choose the right next step without hidden fine print.

Daikin Comfort Pro
Terms shown clearly
Seasonal availability

Daikin Comfort Pro Authorized Dealer rebate

$750 Daikin FIT system rebate

Upgrade to a complete Daikin FIT system — FIT outdoor unit, matching Daikin furnace or air handler, and a Daikin ONE smart thermostat — and we’ll apply Daikin’s $750 homeowner rebate at install.

Valid May 1, 2026 – July 31, 2026

The homeowner rebate requires the purchase and installation of a full Daikin FIT system (FIT outdoor unit and matching Daikin furnace or air handler) and a Daikin ONE smart thermostat by a participating independent Daikin Comfort Pro Authorized Dealer (U.S. only). Manufacturer’s rebate is available May 1, 2026 through July 31, 2026. The program offer is subject to change at any time at Daikin’s discretion. All rights reserved.

Claim Daikin Rebate

Seasonal special

Seasonal HVAC tune-up

Avoid mid-season surprises. Our seasonal tune-up covers a detailed inspection plus cleaning, calibration, and performance checks so small issues get caught before they turn into a no-cool or no-heat call. Call for current tune-up pricing.

Seasonal availability — call for current scheduling

Tune-up pricing and availability may vary by season, system type, and service location. Ask about pairing routine tune-ups with an ongoing maintenance plan.

Sign Up for HVAC Maintenance

Not sure which offer applies? We can confirm eligibility before you schedule.

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Daikin Authorized Dealer

Daikin Comfort Pro
Authorized Dealer.

Daikin is the world's #1 air conditioning brand — and Degenhardt Heating and Cooling is the local, union-trained team certified to design, install, and stand behind it. Global engineering, delivered by the family name that's been on the truck since 1984.

  • Factory-matched high-efficiency systems

    Inverter-driven Daikin FIT and full-system matches — sized to your home and sealed to factory spec by our Local 36 union technicians for quiet, even, efficient comfort.

  • Parts, labor & manufacturer warranties

    Daikin's industry-leading manufacturer warranty, backed by our own parts-and-labor coverage on every system we install.

  • Certified Comfort Pro installation

    As a participating Daikin Comfort Pro Authorized Dealer, our crews install to the exact factory spec that full warranty terms and homeowner rebates require.

Get a Free EstimateExplore Daikin FIT
Daikin Comfort Pro Authorized Dealer

Factory-backed comfort

Daikin

The world's #1 air conditioning brand

Designed, installed & serviced across South St. Louis by Degenhardt Heating and Cooling.

Parts & labor coverage

Warranty support verified at your estimate.

Save up to $750

Explore the qualifying Daikin FIT rebate.

Check rebate
SERVICE AREAS

Proudly Serving South St. Louis
& the Greater Metro

Local experts in your neighborhood — from Saint Louis to Affton, Webster Groves, Kirkwood, Chesterfield, and dozens more communities across Missouri.

7624 S Broadway

Saint Louis, MO 63111

HQ
St. Louis, MO
Affton, MO
Shrewsbury, MO
Webster Groves, MO
Priority
Extended

Not sure if we serve your area?

Call us to confirm service availability in your neighborhood.

(314) 631-1554
Financing Available

Flexible
Financing

Options Available

Don't let cost hold you back. We offer convenient financing options so you can get the service you need today with easy monthly payments.

Convenient Monthly Payments
Flexible Financing Terms
Easy Online Account Management
Quick & Simple Application
Plans for a Range of Budgets
Contact Us to Apply(314) 631-1554

Financing subject to credit approval. Terms and conditions apply.

All Major Cards Accepted
Good to Know

Answers before you call

Straight answers about service areas, the brands we install, our credentials, and estimates — from a real South St. Louis HVAC company, not a call center.

See all FAQsCall (314) 631-1554

What areas do you serve?

Degenhardt Heating and Cooling serves Saint Louis, MO and surrounding communities including Affton, Webster Groves, Kirkwood, Chesterfield, Ballwin, Fenton, and many more. If you are unsure whether we cover your address, call us and we will confirm.

Which heating and cooling brands do you install?

We are a Daikin Comfort Pro Authorized Dealer—we install and service Daikin systems, including the high-efficiency, inverter-driven Daikin FIT. We'll recommend the right Daikin system for your home, comfort goals, and budget rather than pushing a one-size-fits-all box.

Are your technicians NATE certified and union trained?

Yes. Many of our technicians hold NATE (North American Technician Excellence) certification, and our team is union-trained through Sheet Metal Workers' Local 36. That means work is performed to professional craftsmanship, safety, and code standards.

Do you offer free estimates?

Yes. We provide free, no-obligation estimates on installations and replacements. Tell us about your home and what you need, and we'll set up a visit and give you upfront pricing before any work begins.

SOUTH ST. LOUIS HVAC

Ready for Reliable Home Comfort?

Contact our factory-trained technicians today for a free estimate.

Stop settling for recurring HVAC problems. Let Degenhardt Heating and Cooling deliver a solution that's south st. louis hvac, built to last..

Get a New HVAC Estimate
Fast, Flexible Scheduling
Licensed & Fully Insured
Certified Professionals
Upfront Honest Pricing
RAPID RESPONSE

Need service fast?

Call early and we'll work to fit you in as soon as we can

Since 1984
Family-Owned
Local 36
Union-Trained
Free
Estimates

CALL OUR TEAM

(314) 631-1554

Serving Saint Louis, MO & surrounding areas

Flexible Scheduling
Free Estimates Available
Call NowEstimate